Titanium is the material engineers reach for when aluminum is too weak, steel is too heavy and corrosion or biocompatibility rules out both. It is also the material that makes sourcing departments nervous, because titanium parts are genuinely more expensive than aluminum or steel. This guide covers the grades, the cost drivers and the design choices that keep titanium CNC machining predictable — so you specify it only where it pays, and get the right result the first time.
Why titanium?
Titanium is roughly half the density of steel with comparable strength, so the strength-to-weight ratio is outstanding. It resists salt water, chemicals and body fluids, retains strength at elevated temperature, and is biocompatible in the right grades. That combination is why aerospace, medical, marine, chemical and motorsport designs keep returning to it.
The trade-off is cost: titanium raw material costs several times more per kilogram than aluminum or stainless, and it is slower to machine. The correct strategy is to use titanium only where its properties are actually required — and let a free DFM review tell you honestly when they are not.
Titanium grades explained
- Ti-6Al-4V (Grade 5) — the industry workhorse: aerospace structural parts, fasteners, brackets, racing and robotics components. Best overall balance of strength, machinability and availability.
- Ti-6Al-4V ELI — extra-low interstitial version with improved fracture toughness; the standard for implantable medical devices and high-integrity aerospace parts.
- Grade 2 (CP titanium) — commercially pure, corrosion-resistant and weldable; used for chemical processing, heat exchangers, surgical instruments and marine hardware.
- Ti-3Al-2.5V — weldable grade for hydraulic tubing and sporting goods.
- Beta alloys (e.g. Ti-15V-3Cr) — high strength and formability for springs, fasteners and sheet components.
Most quotes start with Ti-6Al-4V unless the application demands ELI or CP grades. We machine the full range — details and capabilities are on our titanium CNC machining page.
What drives the cost
- Raw material: titanium billet and bar are expensive, and machining generates a high proportion of swarf — you buy the material even when it becomes chips.
- Machining time: titanium work-hardens and holds heat, so cutting speeds are lower and tool wear higher than aluminum. Expect longer cycles and more tooling cost per part.
- Tolerance: titanium moves with heat, so very tight tolerances need controlled parameters and inspection discipline. ±0.01 mm is routine; below that, cost climbs.
- Quantity: as with any CNC part, unit price falls with volume — but the material floor stays.
Practical cost-saving levers: relax tolerances that do not affect function, reduce material thickness where stiffness allows, and avoid unnecessary finishing passes. Our engineers flag these in every free DFM review, and you see the effect before approving a quote.
Design tips for titanium parts
- Avoid thin walls and deep, narrow pockets — titanium's stiffness makes thin sections prone to vibration and tolerance drift; design walls above 1.5 mm where possible.
- Use the largest practical corner radius — sharp internal corners concentrate heat and wear tools; a radius of ≥ 1 mm dramatically improves machinability and consistency.
- Specify tolerance only where it matters — put ±0.005 mm on critical fits, ISO 2768-mK elsewhere, and you keep both cost and lead time under control.
- Minimise secondary operations — choose finishes that are achievable on the machine (bead blast, polish) before adding anodizing or plating steps.
- Think about the blank — round titanium parts are cheaper from bar; large flat parts can be cut from plate with near-net blanking to reduce machining volume.
Finishing and inspection
Titanium parts are typically supplied as-machined, bead blasted, polished or electropolished. Type II anodizing is available where a uniform oxide layer is wanted (note: titanium anodizing colours by voltage and is not a coating). Passivation and sterilization-safe finishes suit medical work.
Every titanium order can carry a mill test certificate (EN 10204 3.1) with chemical composition and mechanical properties, plus first-article inspection and CMM reports. This is what makes titanium parts traceable for aerospace and medical release — ask for it in your RFQ. More on our material handling is in our custom CNC machined parts overview.
Lead times and shipping
Titanium prototypes from our Shenzhen ISO 9001 shop typically ship in 5–10 working days after drawing approval; serial production depends on quantity and geometry, and we confirm exact dates in the quote. DDP door-to-door delivery covers Germany, France, Italy, Spain and the USA, so the landed cost is fixed before you approve.
Ready to check a titanium part against your budget? Upload the STEP or PDF and get a quote in 24 hours via our online CNC quote — with a free DFM review included.